Rucksack which may be switched to a front position

ABSTRACT

A rucksack including a bag and a shoulder straps/belt assembly laid out in the back of the bag. The bag is laid out in order to switch from a standard wearing position into a front position. The shoulder straps/belt assembly has two straps each having an upper portion, attached to the top of the back of the bag, an intermediate portion, and a lower portion. The ends common to the intermediate portions and to the lower portions are attached to the bottom of the back of the bag, the distal ends of the lower portions are provided with a fastening system. A sliding system is laid out on the bag in order to slidably mount one of the common ends between the intermediate portion and the lower portion of one of the straps. The strap has a fastening system laid out the common end between the upper portion and the intermediate portion.

The present invention relates to a rucksack interchangeable from astandard wearing position to a front position, notably in order to allowaccess to products contained in the bag, or for facilitating themovements of the user in the sitting position while retaining the bagattached onto the body. The rucksack, object of the present invention,will notably find its application in the field of sports, such asskiing, trekking or bicycling.

The bag will be implemented at manufacturers of textile articles, inparticular manufacturers of bags or manufacturers of sports articles.

In a known way, the rucksack consists of a bag, strictly speaking,forming an envelope capable of containing a load, i.e. articles notablyrelated to the activity practiced by the user of the bag. The baggenerally comprises a pair of shoulder straps and a belt, laid out inthe back of the bag, said components allowing the bag or the envelope tobe worn on the shoulders while maintaining it applied against the back.When the user wishes to access articles contained in this bag, he/sheshould be able to easily handle the system for opening or closing theenvelope, and then view the articles positioned inside the latter inorder to be able to grab the desired product. Traditional rucksacksrequire complete freeing of the rucksack in order to position it in thefront, and to thus easily handle the system for opening the envelope andproperly view the articles contained inside it.

Further, certain activities require that the bag be released from theback in order to facilitate displacement of the user. For example, thisis the case in the field of skiing when the skier takes a chairlift, andshould then be able to properly sit down on the seat during the ascent.The skier then has to remove the bag before sitting down, which has thedrawback of his/her having to grasp both the bag and the ski polesduring the ascent of the ski run.

Rucksacks are known which allow a remedy to be found to these drawbacks,said bags being equipped with means laid out for switching the bag froma standard wearing position on the back to a front position of the bag.This is the case in documents WO 94/15496, WO 2006/025011, U.S. Pat. No.6,619,519 and WO 03/056975 for example.

According to document WO 94/15496, the bag comprises two shoulder strapspositioned as a cross, the upper and lower ends of the shoulder strapsbeing attached by anchoring means onto the back of the bag. Further, thelower ends of the shoulder straps may be detached by means ofconnectors. The first shoulder strap comprises a section forming a loopwhich may be opened by means of a connection system, in order to enlargethe length of the strap. This looped section has a connector laid out inorder to receive as a connection the lower end of the second shoulderstrap when it is detached. Moreover, the bag also comprises a beltprovided with a buckling system, the belt being attached at its sideends by anchoring means on the lateral sides of the bag. Pivoting of thebag from the rear to the front is performed by detaching the connectorat the lower end of the second shoulder strap, this connector being thenattached onto the member for connecting the looped section onto thefirst shoulder strap; the connector of the looped section is then openedin order to release the latter and enlarge the length of the firstshoulder strap, the rucksack may then pass under the arm of the user andswing over to the front position.

According to document WO 2006/025011, the rucksack comprises a firstshoulder strap consisting of an upper portion and a lower portionconnected together by means of a connection system. A second shoulderstrap consists of two straps; the first strap has its upper end attachedto the upper portion of the bag and the lower end attached to the lowerportion of the bag; the second strap is attached to the first strap byforming a loop inside which the user may pass his/her arm. Further, thebag comprises a third strap with which the chest may be belted, thisstrap having its ends connected to the second shoulder strap, one of theends being connected to the primary strap and the other end to thesecondary strap. Switching of the bag is performed by opening theconnection system on the first shoulder strap in order to detach thelatter into two portions, the bag then switching above the shoulder ofthe user on the side of the second shoulder strap, and then pivotingaround the body in order to be positioned towards the front.

According to document U.S. Pat. No. 6,619,519, the bag comprises a pairof shoulder straps, the upper ends of which are attached at the upperportion of the back of the bag. The bag comprises a belting member, theside ends of which are attached to the side lower ends of the back ofthe bag by connecting means. The lower ends of the shoulder straps areattached on the lateral sides of the belt by connecting means. Rotationof the bag on the front may be facilitated by opening the connectors.

According to document WO 03/056975, the bag comprises an envelope and atleast one shoulder strap, the upper end of which is attached to theupper portion of the back of the bag, and the lower end is attached tothe lower portion of the bag by means of a connector. The bag comprisesa waist belt slidably mounted facing the back of the envelope by meansof a slide buckle system. Further, the belt comprises a connector sothat the latter may be separated into two for attachment around thewaist. The bag comprises a connecting member laid out between the lowerportion of the shoulder strap and the belt; this connecting member maybe detached into two by means of a connector. Further, the bag maycomprise a second shoulder strap. Rotation of the bag requires theopening of one of the shoulder straps at its lower portion. The userthen has to loosen the belt while maintaining it closed, whichfacilitates rotation of the bag and of the belt.

The rucksacks applied in documents WO 94/15496, WO 2006/025011 and U.S.Pat. No. 6,619,519 have the drawback of maintaining the belt tightenedaround the waist or around the chest during the switching of the bag.The user then has to loosen the belt, or even open the latter in orderto facilitate the switching of the envelope from the rear to the front,the belt remaining in the closed position on the body of the user. Thedesign of the bag according to WO 03/056975 also requires loosening ofthe belt in order to pivot the bag, and then tightening the latter oncethe bag is repositioned on the back of the user. Such designs furtherrequire that several handling steps be performed in order to pivot thebag from the rear position to the front position, and notably to detachat least one of the shoulder straps, and to loosen, or even open thebelt in order to pivot said bag easily without the belt rubbing orcatching on the waist or the chest of the user.

The rucksack object of the present invention has the purpose ofovercoming the drawbacks existing on the bags from the prior artequipped with a system for switching from a standard wearing position toa front position.

As such, the invention relates to a rucksack consisting of a bag,strictly speaking, forming an envelope, said bag or envelope being ableto contain a load such as products or articles relating to the practicedactivity. Further, the rucksack comprises an assembly consisting of apair of shoulder straps and a belt, said members being laid out in theback of the bag and allowing the latter to be worn on the shoulderswhile maintaining it applied against the back of the user. The rucksackaccording to the invention is laid out so as to switch from a standardwearing position of the bag in the back of the user, to a front positionwhere the bag is positioned on the chest of the user, notably with thepurpose of accessing the products positioned in the bag, or even forallowing the user to free the bag from his/her back, notably with thepurpose of his/her sitting down.

The rucksack according to the invention is remarkable in that theshoulder straps/belt assembly comprises two straps each consisting of anupper portion, of an intermediate portion, and of a lower portion. Theupper portions are attached to the upper end of the back of the bag andare able to be positioned around the shoulders of the user. Theintermediate portions are able to be positioned underneath the arms ofthe user. The upper portions and the intermediate portions form theshoulder straps of the shoulder straps/belt assembly. The lower portionsare able to be positioned around the waist. The ends common to theintermediate portions and to the lower portions are attached to thebottom of the back of the bag, and the distal ends of the lower portionsare provided with a fastening system, the latter being laid out so as tomaintain said distal ends attached. Thus, the upper portions and theintermediate portions form said shoulder straps and the lower portionsattached together form at least the front portion of the waist belt.

Further, at least one sliding system is laid out on the bag so as tomaintain one of the common ends between the intermediate portion and thelower portion of one of the straps, attached facing the back of the bag,while allowing it to be slidably mounted facing the bottom of the backof the bag. Moreover, this strap comprises a fastening system laid outat the common end between the upper portion and the lower portion, thisfastening system being laid out in order to detach said intermediateportion from said upper portion, which allows the shoulder straps to beopened, and the intermediate portion to be then slid on the slidingsystem and thus slacken the waist belt in order to switch the bag to thefront position while avoiding tightening of the belt around the waist.

Preferentially, the bag comprises two sliding systems laid out so as tobe slidably mounted facing the bottom of the back of the bag, bothcommon ends between both intermediate portions and both lower portionsremaining attached to the back of the bag. With this slidable mounting,the shoulder straps may be slackened when the distal ends of the lowerportions forming the waist belt are detached, which facilitates removalof the bag. Conversely, with this design, it is possible to adjust theshoulder straps on the body in the wearing position, once the distalends of the lower portions forming the belt are fastened.

In a preferential and non-limiting way, the bag comprises two fasteningsystems laid out at the common ends between the upper portions and thelower portions of both straps forming the shoulder straps. Such a designhas the advantage of allowing the bag to be used, for both a left-handeduser and a right-handed user, the latter being able to choose at his/herdiscretion to either open the fastening system located on the left strapor the fastening system located on the right strap, in order to detachthe lower portion from the upper portion, forming the shoulder strap,and to slacken at the belt in order to pivot the bag onto the frontportion.

Preferentially, the bag comprises at least one adjustment system laidout on at least one of the straps, so as to adjust the length of thelatter, said adjustment of the length allowing the shoulder straps andthe belt to be systematically adjusted on the body when the distal endsof both lower portions are fastened together.

Further, the rucksack comprises a holding strap, laid out between bothshoulder straps, at least located at the height of the common endsbetween the upper portions and the intermediate portions, or evenpreferably between both upper portions, said holding strap being able toprevent separation between said upper portions of the shoulder strapswhen the bag is in the wearing position. Further, this holding strap hasthe advantage of also preventing separation between the upper portionsof the shoulder straps during the pivoting of the bag into the frontposition on the one hand, and of ensuring that the bag is held againstthe individual when the bag is in the front position on the other hand.

Other features of the present invention will become apparent uponreading the following description of a preferential embodiment of therucksack according to the invention, this description being supported byfigures, among which:

FIG. 1 illustrates the rucksack according to the invention in thewearing position on the back of the user;

FIG. 2 illustrates the rucksack according to FIG. 1 during pivoting froma wearing position to a front position on the body of a user;

FIG. 3 illustrates the rucksack in the front position after pivoting.

As this is illustrated in FIGS. 1-3, the rucksack 1 according to theinvention is laid out so as to be switched from a standard wearingposition on the back, as illustrated in FIG. 1, to a front position, asillustrated in FIG. 3, according to which the user may access articlesor products positioned in the bag, or even free the bag from his/herback with the purpose of being able to sit down properly. The bag 1comprises a bag 3, strictly speaking, formed with an envelope capable ofcontaining products forming the load to be carried. This envelope forexample comprises padding in the back of the bag so as to improvecomfort of the user when wearing the bag.

Further, the back of the bag 3 comprises an assembly consisting of apair of shoulder straps 41, 42 and a belt 31, this assembly allows thebag to be worn on the shoulders and held applied against the back duringmovement. This shoulder straps/belt assembly comprises two straps 5, 7.Each strap 5, 7 consists of an upper portion 9, 11, of an intermediateportion 13, 15 and of a lower portion 17, 19, the shoulder straps 41, 42being formed by the upper portions 9, 11 and the intermediate portions13, 15, whereas the belt 31 is formed by the assembly of both lowerportions 17, 19. For this, the upper portions 9, 11 are attached to thetop of the back of the bag, i.e. at the upper side ends of the bag 3.Thus, the upper portions 9, 11 are able to be positioned around theshoulders in a wearing position on the back, or in a front position.Moreover, the intermediate portions 13, 15 positioned in the continuityof the upper portions 9, 11 are able to be positioned underneath thearms of the user in the standard wearing position on the back. As forthe lower portions 17, 19, positioned in the continuity of theintermediate portions 13, 15, the latter are able to be positionedaround the waist and form the front portion of the waist belt 31. Forthis, the back of the bag 3 may provide a back padding 6, as illustratedin FIG. 1, said padding 6 forming the rear portion of the waist belt 31.

As illustrated in FIG. 1, the distal ends 25, 27 of the lower portions17, 19 are provided with a fastening system 29, said fastening system 29being laid out in order to maintain the distal ends 25, 27 fastenedtogether, upon placing the belt 31.

In a preferential and non-limiting way, the upper portions 9, 11 of thestraps 5, 7 also provide a padding 81, 82 capable of damping the impactsand improving the comfort of the bag positioned on the back andshoulders of the user.

As illustrated in FIG. 1, the rucksack 1 comprises a sliding system 33laid out on the back of the bag 3, notably at the back padding 4, saidsliding system 33 allowing the common end 2 to be slidably mountedbetween the intermediate portion 15 and the lower portion 19, whilemaintaining the latter attached to the bag 3.

Preferentially, the bag comprises two sliding systems 33, 43 laid out atthe side ends of the back padding 6 as illustrated in FIGS. 1 and 3,these sliding systems 32, 43 allowing both common ends 21, 23 to beslidably mounted between the intermediate portions 13, 15 and the lowerportions 17, 19 of both straps 5, 7 facing the bottom of the back of thebag 3.

Further, the strap 7 equipped with the sliding system 33, and preferablyboth straps 5, 7 each equipped with a sliding system 33, 43, eachcomprising a fastening system 35, 39, these fastening systems 35, 39being laid out at the common ends 37, 41 between the upper portions 9,11 and the intermediate portions 13, 15. These fastening systems 35, 39are laid out so as to detach one of the intermediate portions 13, 15depending on the choice of the user, from the upper portion 9, 11, whichallows the shoulder strap 41, 42 to be opened and the intermediateportion 13, 15 to slide on the sliding system 33, 43 while maintainingboth lower portions 17, 19 fastened together, said sliding allowing thebelt 31 to be slackened, said open shoulder strap 41 or 42 and saidslack on the belt 31 allowing the bag 1 to be switched into the frontposition, the loosening of the belt 31 being naturally accomplished uponopening of the shoulder strap 41 or 42.

Moreover, both sliding systems 33, 43 laid out so as to slidably mountboth common ends 21, 23 between the intermediate portions 13, 15 and thelower portions 17, 19 facing the bottom of the back of the bag 3, areable to slacken the shoulder straps 41 and 42 when the fastening system29 is opened and the distal ends 25, 27 of the lower portions 17, 19 aredetached. The slackening of the shoulder straps 41, 42 thus facilitatesremoval of the bag 1 when the user wishes to take it off. Further, withthe design, the shoulder straps 41, 42 may also be adjusted on the body,upon placement on the back of the user and upon closing the fasteningsystem 29.

In a preferential and non-limiting way, the lower portions 17, 19 eachcomprise a blocking member, these blocking members being laid out so asto limit the slackening of the shoulder straps 41, 42 when the lowerportions 17, 19 are detached. These blocking members are described inmore detail hereafter.

Moreover, placement of two fastening systems 35, 39 laid out at thecommon ends 37, 41 between the upper portions 9, 11 and the intermediateportions 13, 15 of both straps 5, 7, in combination with the slidingsystems laid out on the left and right sides in the bottom of the backof the bag, has the function of allowing the bag 1 to be used by both aleft-handed user and a right-handed user, the latter being free tochoose to detach at his/her discretion, the left shoulder strap 41 orthe right shoulder strap 42, in order to switch the bag 1 into the frontposition by pivoting it from the left side or the right side dependingon which shoulder strap is opened.

Preferentially, at least one of the straps 5, 7 and preferably bothstraps 5, 7 comprise at least one system 45, 47 for adjusting the lengthof the strap. This adjustment of the length, in combination with bothsliding systems 33, 43 laid out on the bag 1, allows the shoulder straps41 and 42 and the belt 31 to be systematically adjusted on the body ofthe user upon placing said belt 31, i.e. when the distal ends 25, 27 ofboth lower portions 17, 19 are fastened together.

In a preferential and non-limiting way, an adjustment system 45 is laidout at the distal ends 25, 27 notably on one of the portions of thefastening system 29 attached to the distal ends 25, 27 of one of thelower portions 17, 19. As such, the fastening system 29 consists of amale portion 57 laid out on one of the distal ends 25 and a femaleportion 59 laid out on the other of the distal ends 27, the male portion57 being able to snap onto the female portion 59 for closing thefastening system 29.

According to an alternative design, provision may be made for anadjustment system independent of the fastening system 29, saidadjustment system being in this case directly laid out on one of thelower portions 17, 19, notably on the one of the lower portions 17, 19slidably mounted facing the bottom of the back of the bag 3. It is alsopossible to provide such an adjustment system on each lower portion 17,19. Further, according to this design, said adjustment system has theadvantage of forming said blocking member defined above.

Further, provision may also be made for an adjustment system 47 laid outat the common end 37, 41 between the upper portion 9, 11 and theintermediate portion 13, 15 for one or even two shoulder straps. Thisadjustment system will preferably be laid out on the fastening system35, 39.

As illustrated in FIGS. 1 and 3, the sliding systems 33, 43 laid out onthe lateral sides, in the bottom of the back of the bag 3, areimplemented by means of rings 51, 53, the dimensions of which areadjusted to those of the intermediate portions 13, 15 so as to allowsliding of the latter notably at the common ends 21, 23 of the latter,through said rings 51, 53. As such, by common ends 21, 23 between theintermediate portion 13, 15 and the lower portion 17, 19, is meant thesliding point at the ring 51, 53. These common ends 21, 23 are thereforevariable and depend on the position of the sliding point on the strap 5,7. The position of the common end 21, 23 is therefore variable andlocated on the interval limited by the distal end 25, 27 of the lowerportion 17, 19 and the upper end 73, 75 of the intermediate portion 13,15.

In a preferential but non-limiting way, the lower portions 17, 19comprise an overthickness 55 having dimensions larger than the passagesection of the rings 51, 53, said overthicknesses 55 forming theblocking member as defined above. This overthickness 55 limits thepositioning interval of the common ends 21, 23 between the intermediateportions 13, 15 and said overthicknesses 55. This overthickness 55therefore forms the blocking member able to limit the sliding of thelower portion 17, 19 through the rings 51, 53. As illustrated in FIG. 1,the fastening systems 35, 39 between the upper portions 9, 11 and theintermediate portions 13, 15, forming the shoulder straps 41 and 42consist of a male portion 61, 63 and of a female portion 65, 67, one ofthe male or female portions being laid out at the lower end 69, 71 ofthe upper portions 9, 11, the other of the female or male portions 61,63 being laid out at the upper end 73, 75 of the intermediate portions13, 15. The male portion 61, 63 is able to snap onto the female portion65, 67. Moreover, the male or female portion of the fastening system 35,39 laid out at the upper end 73, 75 of the intermediate portion 13, 15,is of dimensions larger than the passage section of the ring 51, 53.Thus, when the fastening system is open for releasing the shoulder strap41, 42, said portion of the fastening system 35, 39 is blocked on thering 51, 53 when the intermediate portion 13, 15 has completely slidthrough said ring 51, 53. Maintaining the upper end 73, 75 of theintermediate portion 13, 15 and the loosened belt 31 is thereby ensuredduring the switching of the bag 1.

According to an alternative design, it is possible to provide anoverthickness similar to the one defined on the lower portion 17, 19 ofthe strap 5, 7 so as to limit sliding of the intermediate portion 13, 15through the ring when the fastening system 35, 39 is open and the belt31 is loosened.

Preferentially, the bag comprises a holding strap 77, laid out betweenboth shoulder straps 41, 42. This holding strap 77 is positioned atleast at the height of the common ends 37, 41 between the upper portions9, 11 and the intermediate portions 13, 15. This holding strap 77prevents separation between the upper portions 9, 11 of the shoulderstraps 41, 42 when the bag 1 is in the wearing position. Further, italso prevents separation between the upper portions during the pivotingof the bag. Positioning of the holding strap 77 at half-height on theupper portions 9, 11 will preferably be provided. This holding strap 77preferably consists of two strap portions 79, 81 attached to the upperportions 9, 11, said strap portions 79, 81 being capable of beingattached together by means of a fastening system 83, laid out at theirdistal ends.

Moreover, these strap portions 79, 81 comprise an adjustment system 85,87, which is preferably laid out at their proximal ends attached to theupper portions 9, 11 of the shoulder straps 41, 42. This adjustmentsystem 85, 87 allows the length of the holding strap 77 to be adjustedand thus the maximum separation position to be adjusted between theupper portions 9, 11 of the shoulder straps during the wearing of thebag 1 and during its pivoting.

As illustrated in FIG. 2, the bag preferably comprises at least onehandle 89 laid out at the side end 91 of the back reinforcement 6,preferably in proximity to the sliding system 43, said handle 89allowing the bag 1 to be grasped when the fastening system 35, 39positioned on the strap opposite to the position of said handle 89, isdetached, and thus facilitating the pivoting of the bag in order toswitch it into the front position. Preferably a handle 89 will beprovided on each side end 91, 93 of the back reinforcement 6.

Preferentially, the handles 89 are laid out on each side, at the sideends of the back reinforcement 6. However, it is possible to contemplatetheir being directly laid out on each lateral side of the envelope ofthe bag.

1. A rucksack comprising a bag and a shoulder strap/belt assembly laidout in a back of the bag, said bag being laid out in order to switchfrom a standard wearing position to a front position, the shoulderstraps/belt assembly comprises two straps each having an upper portionattached to the top of the bag, an intermediate portion and of a lowerportion, ends common to the intermediate portions and to the lowerportions being attached to a bottom of the back of the bag, distal endsof the lower portions being provided with a fastening system laid outfor maintaining said distal ends fastened, so that the upper portionsand the intermediate portions form said shoulder straps, and that thelower portions fastened together form at least a waist belt frontportion, and at least one sliding system is laid out on the bag so as toslidably mount one of the ends common between the intermediate portionand the lower portion of one of the straps facing the bottom of the backof the bag, said strap comprising a fastening system laid out at the endcommon between the upper portion and the intermediate portion saidfastening system being laid out in order to detach said intermediateportion from said upper portion so as to open the shoulder strap and toslide the intermediate portion on the sliding system, in order toslacken the belt and thus switch the bag into the front position.
 2. Thebag according to claim 1, further comprising two sliding systems laidout on the bag for slidably mounting both ends common between theintermediate portions and the lower portions, facing the bottom of theback of the bag, said sliding systems allowing the shoulder straps to beslackened when the distal ends of the lower portions are detached,facilitating removal of the bag, and for adjusting the shoulder strapson the body in the wearing position.
 3. The bag according to claim 2,wherein at least one lower portion comprises a blocking member, saidblocking member being laid out so as to limit the slackening of theshoulder straps when the lower portions are detached.
 4. The bagaccording to claim 2, wherein two fastening systems are laid out at theends common between the upper portions and the intermediate portions ofboth straps.
 5. The bag according to claim 2, wherein at least one ofthe straps comprises at least one system for adjusting the length ofsaid strap, the adjustment of the length allowing the shoulder strapsand the belt to be systematically adjusted when the distal ends of bothlower portions are fastened together.
 6. The bag according to claim 5,wherein an adjustment system is laid out at the distal end of one of thelower portions.
 7. The bag according to claim 5, wherein an adjustmentsystem is laid out on at least one of the lower portions, saidadjustment system forming a blocking member laid out to limit theslackening of the shoulder straps when the lower portions are detached.8. The bag according to claim 5, wherein an adjustment system is laidout at the end common between the upper portion and the intermediateportion of at least one of the shoulder straps.
 9. The bag according toclaim 2, wherein the sliding systems are formed by rings laid out onlateral sides at the bottom of the back of the bag.
 10. The bagaccording to claim 9, wherein the lower portions comprise anoverthickness of a size larger than the passage section of the ring,said overthickness forming a blocking member, capable of allowing theintermediate portion to slide through the rings and said overthicknessto be blocked in order to prevent sliding of the lower portions throughsaid rings, said blocking member being laid out so at to limit theslackening of the shoulder straps when the lower portions are detached.11. The bag according to claim 1, wherein in that the fastening systembetween the lower portions of the straps have a male portion laid out onone of the distal ends and a female portion laid out on the other of thedistal ends, the male portion being capable of snapping onto the femaleportion.
 12. The bag according to claim 9, wherein the fastening systembetween the upper portion and the intermediate portion forming theshoulder strap, has a male portion and a female portion, one of the maleand female portions being laid out at the lower end of the upper portionand the other portions being laid out at the upper end of theintermediate portion, the male portion being capable of snapping ontothe female portion.
 13. The bag according to claim 12, wherein the maleor female portion of the fastening system, laid out at the upper end ofthe intermediate portion of the shoulder strap, is of dimensions largerthan the passage section of the ring so as to block said portion on thering when the intermediate portion has completely slid through saidring, and to ensure holding of said intermediate portion and of theloosened belt during the switching of the bag.
 14. The bag according toclaim 1, further comprising a holding strap laid out between bothshoulder straps, at least at the common ends between the upper portionsand the intermediate portions, in order to prevent separation betweensaid upper portions of the shoulder straps when the bag is in thewearing position.
 15. The bag according to claim 14, wherein the holdingstrap has two strap portions attached to the upper portions, the ends ofsaid strap portions being able to be attached by means of a fasteningsystem.
 16. The bag according to claim 15, wherein the strap portionscomprise a length adjustment system for adjusting the maximum separationposition between the upper portions of the shoulder straps.
 17. The bagaccording to claim 1, further comprising at least one handling handlelaid out on a side opposite to the fastening system, said handle beingable to facilitate the switching of the bag into the front position.